Show that an integer is divisible by 9 if and only if the sum of its decimal

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Show that an integer is divisible by 9 if and only if the sum of its decimal digits is divisible by 9.

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 02, 2016 12:27 PM

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Show that an integer is divisible by 9 if and only if the sum of its decimal

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Discrete Mathematics and Its Applications

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